How to used _httpContextAccessor inside Startup.cs - ConfigureServices()

Question

User-893002196 posted

Hi,

how can I use var path = _httpContextAccessor.HttpContext.Request.Path.Value; under ConfigureServices()?
My code idea as below:

public class Startup
    {       
        string clientid = "";
        string clientsecret = "";
        string aadInstance = "";
        string tenant = "";
        string connectionString = "";
        string vaultAddress = "";
        string connectionStringDev = "";
        public Startup(IConfiguration configuration)
        {
            var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
            .AddEnvironmentVariables();
            clientid = configuration["AzureAd:ClientId"];
            clientsecret = configuration["AzureAd:ClientSecret"];
            aadInstance = configuration["AzureAd:Instance"];
            tenant = configuration["AzureAd:TenantId"];
            vaultAddress = configuration["KeyVaultUrl"];
            Configuration = configuration;
        }

        public async Task<string> GetAccessToken(string authority, string resource, string scope)
        {
            var clientId = clientid;
            var clientSecret = clientsecret;
            ClientCredential clientCredential = new ClientCredential(clientId, clientSecret);
            var context = new AuthenticationContext(authority, TokenCache.DefaultShared);
            var result = await context.AcquireTokenAsync(resource, clientCredential);
            return result.AccessToken;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => false;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddAuthentication(AzureADDefaults.AuthenticationScheme)
                .AddAzureAD(options => Configuration.Bind("AzureAd", options));


            //Register authentication call back - this would be executed for any request to Azure key vault.  
            KeyVaultClient keyVaultClient = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(GetAccessToken));

            var path = _httpContextAccessor.HttpContext.Request.Path.Value;
            var pathStr = path.Split(':')[0].ToString() + "://" + path.Split('/')[1].ToString();
            var DBKeyName = (pathStr == "https://abc.azurewebsites.net") ? "DatabaseConnStr" : "DatabaseConStrDev";
            var DBKeyGuid = (pathStr == "https://abc.azurewebsites.net") ? "75xx233cxxxxxxxxxxxxxxx" : "22xx06axxxxxxxxxxxxxxx";
            var secret = keyVaultClient.GetSecretAsync(vaultAddress, DBKeyName, DBKeyGuid).GetAwaiter().GetResult();
            var storagePrimaryAccessKey = secret.Value;
            connectionString = storagePrimaryAccessKey;


            services.AddDbContext<XXDBContext>(options =>
    options.UseSqlServer(connectionString));

Please advise.

Thanks

Regards,
Micheale

Answer 1

User-474980206 posted

No can do. A HttpContext is bound to a request. At startup there is no request.

Answer 2

User-893002196 posted

Thanks Sir,

I manage twist around. I added a variable into appsettings.json

eg:    "liveSite":"true"

Then I modify my code:- calling the variable configuration from startup. 
If I want to upload the code to Development Site, I just need to change the variable to false.

public class Startup
    {       
        string liveSite= "";
        :
        public Startup(IConfiguration configuration)
        {
            :
            liveSite= configuration["liveSite"];
            Configuration = configuration;
        }

var DBKeyName = (liveSite== "true") ? "DatabaseConnStr" : "DatabaseConStrDev";
            var DBKeyGuid = (liveSite== "true") ? "75xx233cxxxxxxxxxxxxxxx" : "22xx06axxxxxxxxxxxxxxx";
            var secret = keyVaultClient.GetSecretAsync(vaultAddress, DBKeyName, DBKeyGuid).GetAwaiter().GetResult();
            var storagePrimaryAccessKey = secret.Value;
            connectionString = storagePrimaryAccessKey;

Issue Resolved.

Thanks.

Regards,
Micheale